These thick, gooey Fudgy Brownies made with sourdough discard are truly a hit with all my friends. Whenever we gather and I offer to bring dessert, someone always asks for these brownies. They’re simple to throw together, deeply chocolatey, and perfectly rich with that signature shiny crackly top and ultra-fudgy center.
The sourdough discard adds the slightest tang that balances the sweetness beautifully while somehow making the chocolate flavor feel even deeper and richer. They bake up dense, chewy, and decadent—the kind of brownie where a small square somehow feels both completely satisfying and impossible to stop eating.
I highly suggest waiting to cut them until they’re completely cool and using a knife dipped in hot water. They are *that* fudgy. I usually cut them into 1-inch squares because they’re wonderfully rich.
These brownies also freeze beautifully, making them perfect for make-ahead desserts or emergency chocolate cravings hidden away in the freezer.
Meanwhile, it’s always nice using up some extra sourdough discard. Somehow I’m always afraid I’ll run out, so I overfeed my starter and end up with extra discard. Are you like me? This recipe is one of my favorite ways to use it up instead of wasting it.
So put on your Apron First and let’s get baking!
Why You’ll Love These:
– Ultra fudgy and gooey texture
– Deep rich chocolate flavor
– Perfect use for sourdough discard
– Easy freezer-friendly dessert
– Crowd-pleasing and family approved
❤️ Cozy Note
There’s something about a pan of rich chocolate brownies cooling on the counter that instantly makes a home feel warm, cozy, and impossible to resist.
Ingredients
Butter (113g | 8 tbsp) – Helps create the rich silky chocolate base
Chocolate Chips (350g) – Semi-sweet works beautifully, but dark chocolate also works
Cocoa Powder (50g) – Intensifies the chocolate flavor
Vanilla Extract (2½ tsp) – Adds warmth and depth
Eggs (3) – Helps create structure and fudgy texture
Sugar (150g | about 1 cup) – Sweetens and creates that crackly brownie top
Brown Sugar (100g | about ½ cup) – Adds moisture and chewiness
Sourdough Discard (125g | ½ cup) – Adds subtle tang and helps create rich texture
All-Purpose Flour (150g | about 1 cup) – Gives structure while keeping brownies tender
Salt (5g | 1 tsp) – Balances sweetness and enhances chocolate flavor
Optional Finishing Salt or Caramel Drizzle – Adds a bakery-style finishing touch
{All ingredients listed below with exact amounts needed.}
Equipment
- Upright mixer (Here’s the one I love) or hand mixer
- Sauce pan
- Mixing bowls
- Whisk
- 9×9 baking pan
- Parchment paper
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Step 1: 1. Prepare Baking Dish
Line a 9×9 baking pan with parchment paper, allowing excess parchment to hang over the sides for easy lifting later.
Step 2: Melt Chocolate Mixture
In a medium saucepan:
- melt butter
- add chocolate chips
- cocoa powder
- vanilla extract
Stir until fully melted and smooth.
Remove from heat and allow to cool slightly.
Preheat Oven
Preheat oven to 350°F.
Step 3: Beat Eggs & Sugars
In an upright mixer, beat:
- eggs
- granulated sugar
- brown sugar
Mix on medium speed for about 8–10 minutes until lighter and slightly fluffy.
Step 4: Add Wet Ingredients
Mix in:
- sourdough discard
- cooled chocolate mixture
Mix on low speed until combined.
The batter will be thick.
Step 5: Add Dry Ingredients
Fold in:
- flour
- salt
Mix only until incorporated.
Step 6: Bake
Spread batter evenly into prepared pan.
Bake for:
- 32–35 minutes in a metal pan
- 35–40 minutes in a ceramic pan
The center should still look slightly soft for maximum fudginess.
7. Cool & Slice
Allow brownies to cool completely in the pan.
Lift brownies out using parchment paper.
For clean slices:
- dip knife into hot water
- wipe dry between cuts
Slice into small squares because these are extra rich and fudgy.
Troubleshooting Brownies
Brownies turned cakey
Too much flour or overmixing can create a cake-like texture instead of fudgy brownies.
Brownies too gooey in the center
They may need a few more minutes baking time, especially in ceramic pans.
No shiny crackly top
Beating the eggs and sugar long enough is key for creating that signature shiny top.
Brownies hard to cut
They likely need more cooling time. Chilling briefly in the refrigerator also helps.
Table Conversation Starter:
Corner brownie piece or center brownie piece—which is better?
What’s your favorite dessert of all time?
If you opened a bakery, what would your signature dessert be?
Tips and Tricks
- Do not overbake – Slightly underbaked gives the best fudgy texture
- Use room temperature eggs – Helps create shiny crackly tops
- Cool completely before cutting – Important for clean slices
- Hot knife trick – Dip knife in hot water between slices
- Freeze individually – Slice before freezing for easy grab-and-go treats
- Use discard anytime – Active or unfed discard both work beautifully
You might also like these:
- Vanilla ice cream
- Fresh strawberries or raspberries
- Cold milk
- Salted caramel drizzle
- These would go nicely after a dinner of Easy Sheet Pan Pizza
Best Fudgy Sourdough Discard Brownies
Ingredients
Equipment
Method
- Line a 9×9 pan with parchment paper.
- Melt butter, chocolate chips, cocoa powder, and vanilla together. Cool slightly.
- Beat eggs and sugars for 8–10 minutes.
- Mix in discard and chocolate mixture.
- Fold in flour and salt.
- Bake at 350°F for 32–40 minutes depending on pan type.
- Cool completely before slicing.
Notes
Tips & Tricks
- Do not overbake – Slightly underbaked gives the best fudgy texture
- Use room temperature eggs – Helps create shiny crackly tops
- Cool completely before cutting – Important for clean slices
- Hot knife trick – Dip knife in hot water between slices
- Freeze individually – Slice before freezing for easy grab-and-go treats
- Use discard anytime – Active or unfed discard both work beautifully
Table Conversation Starters 🍽️
- Corner brownie piece or center brownie piece—which is better?
- What’s your favorite dessert of all time?
- If you opened a bakery, what would your signature dessert be?
- Warm brownies or chilled brownies?
